Do Not Do This at Home A question parents have pondered for years: When is a child watching too much television? Let's turn to East Lansing, Mich., for the answer. There, a pair of Michigan State wide receivers -- Terry Love and Irving Campbell -- were arrested last week for possessing a dangerous chemical after they allegedly exploded "MacGyver"-style bombs outside campus apartments. No one was injured in the two explosions. Perhaps, though, these two fine young men watched the wrong program. B.A. Baracus and Hannibal Smith of "The A-Team" never would have been caught in such a situation. What in the name of    Richard Dean Anderson  is going on?