Why are [some] people so horrible?

Following a particularly unpleasant comment posted on here last night/earlier today I have decided not to allow any more comments on this blog. I apologise to the nice people who have left comments in the past, but I don't want anything remotely resembling a repeat of what was posted here last night. I did consider deleting the blog, but have decided to continue for the time being, although I don't really feel like writing anything (except this short explanation) at the moment.

I may be being oversensitive, but these things get to me.