Tactical Insertions do not glow red for all players, they emit a red light. Here is a picture of what tactical insertions look like with engineer:
http://postimg.org/image/pxkltxxmz/
And this is what they look like when you don't have Engineer equiped:
http://postimg.org/image/byxyi3ed1/
As you can see the perk only half works.
