Re: I've seen a definite uptick in these
Yes - I have had a number of these claiming they have my webcam pictures. Minor problem is that I do not have a webcam.
On a separate point of invalid email addresses I remember when I was still working as a lecturer in a FE college trying to get on a news list from a website which needed my email address to complete the form. It complained that my email address was invalid. My email address was david.cluley@<college>.ac.uk - a perfectly valid address which had no trouble receiving emails. The web site in question? IBM. You would think that they might have got some idea about how the email system works.