4 Rolled back because the repetition the editor deemed necessary had its source in the sample sentence provided by the OP and there is not good reason to change it.
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Per the OEdOED: Reckless adj

Heedless of or indifferent to the consequences of one's actions; lacking in prudence or caution; willing or liable to take risks; rash, foolhardy; irresponsible.

For your example, you would need to change it slightly as this isn't a noun:

Tom is so reckless! He knows this will cause him trouble in the future, it has caused him trouble in the past, but he just does it anyway.

Per the OEd: Reckless adj

Heedless of or indifferent to the consequences of one's actions; lacking in prudence or caution; willing or liable to take risks; rash, foolhardy; irresponsible.

For your example, you would need to change it slightly as this isn't a noun:

Tom is so reckless! He knows this will cause him trouble in the future, it has caused him trouble in the past, but he just does it anyway.

Per the OED: Reckless adj

Heedless of or indifferent to the consequences of one's actions; lacking in prudence or caution; willing or liable to take risks; rash, foolhardy; irresponsible.

For your example, you would need to change it slightly as this isn't a noun:

Tom is so reckless! He knows this will cause him trouble in the future, it has caused him trouble in the past, but he just does it anyway.

3 Rollback to Revision 1
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Per the OEDOEd: Reckless adj

Heedless of or indifferent to the consequences of one's actions; lacking in prudence or caution; willing or liable to take risks; rash, foolhardy; irresponsible.

For your example, you would need to change it slightly as this isn't a noun:

Tom is so reckless! He knows this will cause him trouble asin the future, it has caused him trouble in the past, but he just does it anyway.

Per the OED: Reckless adj

Heedless of or indifferent to the consequences of one's actions; lacking in prudence or caution; willing or liable to take risks; rash, foolhardy; irresponsible.

For your example, you would need to change it slightly as this isn't a noun:

Tom is so reckless! He knows this will cause him trouble as it has in the past, but he just does it anyway.

Per the OEd: Reckless adj

Heedless of or indifferent to the consequences of one's actions; lacking in prudence or caution; willing or liable to take risks; rash, foolhardy; irresponsible.

For your example, you would need to change it slightly as this isn't a noun:

Tom is so reckless! He knows this will cause him trouble in the future, it has caused him trouble in the past, but he just does it anyway.

2 Removed unnecessary repetition.
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Per the OEdOED: Reckless adj

Heedless of or indifferent to the consequences of one's actions; lacking in prudence or caution; willing or liable to take risks; rash, foolhardy; irresponsible.

For your example, you would need to change it slightly as this isn't a noun:

Tom is so reckless! He knows this will cause him trouble in the future,as it has caused him trouble in the past, but he just does it anyway.

Per the OEd: Reckless adj

Heedless of or indifferent to the consequences of one's actions; lacking in prudence or caution; willing or liable to take risks; rash, foolhardy; irresponsible.

For your example, you would need to change it slightly as this isn't a noun:

Tom is so reckless! He knows this will cause him trouble in the future, it has caused him trouble in the past, but he just does it anyway.

Per the OED: Reckless adj

Heedless of or indifferent to the consequences of one's actions; lacking in prudence or caution; willing or liable to take risks; rash, foolhardy; irresponsible.

For your example, you would need to change it slightly as this isn't a noun:

Tom is so reckless! He knows this will cause him trouble as it has in the past, but he just does it anyway.

1
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