This is what I tell my friends who have, or are planning to have, kids:
If I like you, I will never give your kids toys that make electronic noise (and non-electronic noise is iffy... depends on the toy), Play-doh, markers/crayons/etc., or otherwise messy things without your express approval. I will always check with you if I'm not sure how you'd feel about something coming into your house.
If I do not like you, your kid could end up getting a screen-printing kit or a pottery wheel (I have actually given both of these things to my niece).
Friends (and family) have learned how I really feel about them around their kids' birthdays and Christmas. 
SIL, BIL and everyone else in DH's family seems to get neice and nephew noisy toys (also completely age INappropriate if you ask me). SIL deliberately leaves them at FIL's house (even if she bought them!) since he watches the kids one day each during the week. We live with FIL and I'm pretty sure all the noisy toys are here.
SIL also leaves toys here that we get the kids, so it really seems like she doesn't like them (or us, but I'm not bothered by that), even if the toys are quiet and cuddly. Other toys get brought home, but whatevs.
Actually, she did bring home the cuddly toy we brought first born.... Then when second born came, she had first born give that exact cuddly toy to second born as a 'gift to the new baby'.

I'm pretty sure the tags were still on, too... which makes it definitely NOT cuddly.

She's training regifters and she's not even hiding it!
Don't get me started on the Christmas gift we've given her, still in their original packaging years later at FIL's house (along with loads of stuff she's bought herself which is stored in the room we're sleeping in even though she's got a house of her own) and probably well out of date. We stick to cards now. A bit lame, but I'm not going to stress about a gift if she doesn't want it.
Phew.... that felt good to get out.