They have some value to someone. Even if not for the building, there are those that like to collect older kits as collectors items. Some fo those kits are still pretty good builds and maybe it will respark your interest.
If you still think you want to trash them, rather than that, turn them over to a social center, youth program, take them to the local nursing home, put them in a box and give them to the local IPMS chapter, someeone will like building them.
Mike
"Imagination is the dye that colors our lives"
Marcus Aurellius
A good friend will come and bail you out of jail...but, a true friend will be sitting next to you saying, "Damn...that was fun!"