I just had to report one that said "lovemarriagespecialist jflkahfigoadhsiogiodfago;iadjklfjo'iadgikadifnga'pjgo]djfaoighklsdhfgiosdhaoigfhdioshngoidfhoighio;dafgio" only it had about 200 lines of random gibberish and a random picture attatched. i am so sick of these, and hope that something is done about it.
Occasional ones might make it through but a good 90%+ are automatically being caught by the spam filter. They aren't marked instantly but are usually marked as spam within 30 seconds of being created. It's not really necessary to report them until they've been around for 2 or more minutes (to assume the spam filter did not catch it).
If the spam filter was not doing its job you'd see things like an entire page of spam threads (especially once nighttime hits). It was happening last night as well. It happens every day.