Do you pre-approve your child's gifts?

My SIL has been getting some ridicule this Holiday season for wanting to know in advance what gifts family members are getting her children for the Christmas season.

She's always been pretty strick on toys and things, but this has come after someone gave her 12 year old son a Nintendo 3DS for his birthday this year. (She's very against video games, which is absolutely her choice as a parent.)

Now it's totally fair that she wasn't happy her son was given a gift that goes against her beliefs as a parent, but she's now demanding to know what the gifts are ahead of time or the child won't get to open it.

Family members aren't super happy especially because she has made it clear certain gifts won't be approved, especially anything tech related. She also only wants gender neutral stuff and no kind of food or candy.

I honestly see both sides to this. There's definitely certain toys and things I don't want my child to have, but I also get that grandparents are feeling upset that their gift may get rejected.

Is she being to tough about this? What would you/what do you do as a parent regarding gifts?

Bonus: Have you ever had your child open a gift that you didn't want them to have?