Have you? Why do you ask? Do you want to commiserate?
The truth is if you have experienced it, most likely so have others. But do not assume for a moment that such things are limited to studios in Colombia, or indeed, studio based models. If you have hard evidence of a scam being perpetrated, I guess you could report to the site you frequent, but I stress again: *proof*.
The world of cam models is fraught with potential "dangers". We as users must keep our wits about us and not always make decisions based on what our erect penises (and blood deprived brains) tell us