How can I tell if someone blocked me? (

Actually you were not blocked nor did he delete the thread.  I deleted it because that account is a spam account that hits the forums every night and has for a long time despite attempts to block his accounts.

My apologies for deleting your post as well but you were conversing with a spam bot.

Sorry man, he is 100% a spam bot.  I delete his posts every single morning.  He is a quality bot though, provides some actual info but always has something in there about where to go buy something.