People can suggest that bringing in the M10 as is straight through security is fine as is, but be aware you are doing so at your own risk. People are forgetting to mention that we are in a "see something say something" day in age. Not meaning to make anyone paranoid here, but that also means if something is seen that security people aren't familiar with or don't know what it does, they have that chance to go to someone else to get that looked at and have the situation escalated and resolved there. Could you get your recorder in by that point? It's 50/50 I think and you'll notice at some areas that some people do have their stuff turned in for them to get after the show. Yes, there are people out there who will let those things pass without question, but there are some who see it and don't understand what it does enough to get a supervisor to look into it. It might make some tapers a little upset because of what they wanted to do, but bear in mind that security are doing their job and we can't argue that when we know we are bringing things in that weren't allowed in the first place.
Just wanted to offer my two cents on the situation. It's not the same world as it once was with all the metal detectors at many venues now. These venues are being a little more protective and alert on what is coming in. Some will let this stuff pass, but just be careful on how you plan to bring that in.