I went to a lecture the other day by an American designer of GNSS approaches who admitted they'd had problems in the USA with GPS jammers around major airports that passed close to major roads. Many american truckers are using GPS jammers to stop themselves being tracked.
I just looked on eBay - well under 20 quid for a GPS jammer from Hong Kong !
The same lecturer told us that it's fairly straightforward to build a GPS jammer with a 50nm range.
So, me, I like the option of ILS, VOR and even NDB approaches. The more options, the more chance that something hasn't been mucked about by some arsehole who doesn't care about anybody else so long as he can avoid his truck being tracked. (Or does care, and wants to cause trouble!).
G
N.B. The IMC also qualifies you to fly GNSS approaches using a panel mounted GPS. They're becoming more common in the UK and are almost universal in North America. Yes, I know you can't use your IMC in North America.