Actually, belated thought: it might be cool for people using the random gifts feature to have the option of sending a pre-set message to the recipient, to say that it's from the Sponsor-a-Random-User feature.

At the moment, people have no way of knowing whether they've got an anonymous admirer or shy friend -- in one case I actually chose not to sponsor someone because I took a look at their DW and was worried that they'd be creeped out by an anonymous gift!