Not at all its as solid as a rock.
Only a couple of times (in 9 years) i have had a rowdy crowd / not enough space for the guests and put a chair between the screen and sub. Only the laptop is a bit rickety with the Uberstand, but I have a UDG one now, so thats pretty stable too and at least a metre from any guests. The best thing about this setup is there is no storage cases or any other flight cases, as everything other than the speaker bags are being used. :)
You can kind of see the distance here. about 1 meter, but i have a second screen if needed to create further space.
Attachment 18231
On the booth note, a lot of the booths I have seen have the laptop precariously close to the punters as they can just lean over and shut it or spill a drink on it (like the below) but I can see the allure of a stainless Lite Console as that is nice and rigid you can hurl a 20 stone man at it and it should stay intact! Mind you my flight case and sub is very sturdy as they weigh about 40K at least, but those screen are pretty crap if you have some serious weight thrown against it. Thats why they cost £100 vs £800. :)
Attachment 18230