I responded today on a Stack Exchange site and later realised that my words had been of a slightly different character than if I had, say, left a post-it note on a colleague's desk whom I knew by face-to-face conversation.
This is not because of anonymity as I choose not to be anonymous on the internet and my personal details are freely available to anyone who can be bothered to look.
I was not being deliberately discourteous or disrespectful, nor was I being consciously confrontational or abrupt. But my written response was just lacking in humanity, merely because that person's presence is limited to being transitory (yes, I know it is archived - I mean what is visible) text on a screen.
I have already exhausted my own - related - vocabulary in the preceding paragraph, so what else might fit in the following sentence ?
Because it was an internet communication, my attitude was somewhat _________.