We've been getting a lot of spam lately

[GeeTwo]

If you see a thread title that looks weird, hover the mouse over the thread title and read the first dozen or so words. This will tell you 95+% of the time if you have a spam post. If it looks like spam and has exactly one reply, ignore it.

If you decide it is spam and see zero replies, click through to it, verify whether it is spam, and if so report it as spam by clicking on the caution/yeild sign at the upper right of the post, then do a reply with the single word "Reported." so that the site admins aren't overloaded with duplicate reports.

Edit: Spammers vs web sites is an arm race; my advice will probably be quite wrong in a matter of weeks.