What would it mean when someone says 'be careful' of him?

[Anonymous]

As in there's a guy who's a player and he constantly finds a way to contact a girl, (even when she blocks his number)
And she gets told to 'be careful' of him.. what would it mean?
I know it's obvious, but I'm asking cause this guy isn't the type to cause harm or be violent or anything so what else could the reason be?

He may cause harm

He may get obsessive and stalk

He may spread rumors

Other?

Updates

+1 y

He's also known as 'the creep'

[oldanddecrepid]

It could be all of the above! However, I tend to trust my own judgement and not let people sway it too much!

The run-in the two person had could be swaying their opinion of one another, when both are equally responsible.

[psychomonkey]

They are trying 'warn' that he only wants sex and thats it.

[TheGeorge]

He will make you have sex with him and dump you afterwards. He will hurt your feelings.