Soooo... you cover your gear with protective film? Would that be like PROaudio PHYLACTICS?
(ba-boom)

a variety of stupid ideas:

1) use gift wrap to cover them. Wives love gifts more than they like plastic bags. An added advantage of doing this is that you can hide Christmas and birthday gifts out in the open and nobody will know which are real gifts and which are gear. Plus, once she realizes some of the boxes might be gifts, she'll feel a lot better about seeing the number of boxes increase

2) Get magazines and cut the eyes out of face pictures and then paste the eyes on the boxes. Then give names to each box. Pick sentimental-sounding names like "BABY" "MOM" "HONEY" etc After doing that, they'll be creepy, but in a way that will be hard for your wife to act on. What woman can recommend that you get rid of "MOM?" (OK, bad example...)

3) Bunny ears. Put bunny ears on the boxes. She might think they're cute

4) <obvious>
Or... you could keep them in the factory box and store them in a closet until you're ready to use them.</obvious>

5) Keep a jar on a shelf labelled "GEAR". Every time you have the irresistible urge to buy new gear put the money in the jar, but don't buy the gear. Later when you're ready to rock, whatever you buy with the jar money will be new technology, not something you bought 6 years ago and stashed, and is now incompatible with current technology.

6) if she complains that she hates looking at all the mess, put one of the bags over her head so she can't see it. Plus there are enough old jokes about "a bag over her head" that one of them might suggest a way to make things interesting