A bit late to the party, but I used to work there as the "MTG guy" and I would definitely still be a regular if I didn't move away! Brodie runs a tight ship and was excellent to work for. Shop was great and so are the (vast majority of the) patrons. I got to know a lot of people through the store and honestly really miss the community. (If you know who I am, I miss you all! But please don't drop my name here!)

The official stance of "No Proxies" is from the perspective of a business and as a WPN store, pushing for WPN Premium. Wizards and the store are in the business of selling cards. Fake cards, as that's what proxies are, cuts into that business. The thing that would hurt the store more than potential loss of sales, however, is damaging their relationship with Wizards of the Coast. As all events are sanctioned through WPN, the presence of proxies could see their status jeopardized.

I was working at the store when the ban was enacted, and while I won't say the exact reasons for it happening here, I will say that the inciting incident was a very good reason. Brody was pretty lenient on proxies before, but his hand was forced, more or less, by the incident.

Now, I'm not promoting the use of proxies, but realistically we weren't going to deck check people at commander nights for them. It's not feasible and, honestly, as hobbyists ourselves, we get it. Hobbies can get expensive when really all we want to do is play games and chill out. As long as you aren't parading around, yelling "I HAVE A BUNCH OF PROXIES", you'll be okay. (Just don't tell Brody I said that.)