I know most other collectors hate repros, but I have no problem with them. They serve a purpose. I have over 4,000 figures and buying vintage weapons for every one would be insane. So about 1,200 have repro weapons for now. I would rather they have something than nothing.
Also, repro weapons help keep the price of real vintage weapons from getting too out of control. It is all supply and demand. Repro weapons offer the casual collector a cheap alternative. Rather than spending $40 for a black Leia blaster (the current price on ebay as of August, 2016), they can get one for $2. That means one less person fighting for the limited number of original vintage Leia blasters. Otherwise, the price for a black Leia blaster would be well over $100.
So every collector out there who is buying original vintage weapons and accessories should be thankful that repro weapons exist. The only people who should be against repro weapons are the ones trying to rob us collectors blind by charging $20 for a Han smuggler pistol. They want to charge more, so of cource they are against a cheap alternative.
That said, I am against fraud. I am against dealers trying to pass off repro weapons as a real ones. That isn't a problem with the repro weapons, but rather a problem with dishonest dealers. Of course they all then claim not to be an expert on the subject. Even some of the biggest Star Wars dealers on ebay will try to pass off repro weapons as real and then claim they had no idea. That drives me insane.
My one word of warning is "caveat emptor". Buyer beware. It is up to we, the collectors, to be able to spot fakes and not over spend for repro weapons. That's why I am so glad that sites like Imperial Gunnery exist to help fans.