Those loose pins can be quite irritating and they are not uncommon, but there are several ways to resolve it. One is to carfully 'bump' up the pin's dia. w/it exactly in place. That can be done with a close fitting ground flat punch and a suitable anvil surface on the off side, even another flat ground punch held in a vise. Another is to use Locktite as you mentioned and another would be simply use a bit of fingernail polish applied to it and perhaps in the hole on the off side and then slip it back in. Any extra can be wipped off. A fourth option might be to knurl the pin on one end or simply tap it lightly with a center punch to make a couple of small craters in it's side in one end only before driving it back in, but that's a bit hit & miss and if over done may distort the hole when its tapped back home. Some pins are knurled by having lines in them that are parallel to their length and that too may be accomplished quite easily by clamping a small sharp chisel in a vise and holding the pin by one's finger setting it directly over the chisel's edge [in line and one one end only] and lightly tapping the pin w/ a small brass or bronze hammer or mallet. The pin should be soft so no need for any effort here you are only trying to 'raise' a slight shoulder either side of the indentation or line being imprinted so it has a good friction fit. Personally, I'd bump the dia. up and be done w/it. Just some thots.