when you have nothing coherent to say, I suppose a groan helps you to feel better.   I've never groaned at anyone.    As I've said before, when I feel that exchanges between myself and another poster just turn in to boring 'you're another' slanging matches, I put them on 'Ignore', which causes, I think, quite a few of the groans I get.   If it helps them, good!    I genuinely don't notice nowadays.