last year i had to run around as my Daughter wasn't allowed to touch the toys....I mean models.
There is good reason most exhibitors do not like children touching their models, children have sticky fingers, both types! While the medium chosen for our displays is primarily a childrens toy, it's like saying kids can go play with paintings in a gallery because they have paint at home and at school. People have invested a lot of time and money in their displays and while official sets and technic are designed for play and have durability built in to the design, a lot of MOCs are not designed this way The minifigs have usually been positioned to make a scene, some of the techniques used can be fiddly, unstable and delicate so kids touching a display can easily damage a model requiring the exhibitor to fix it or remove it from display if it's not a quick fix. I've been exhibiting for about a year and a half now, in that time i've only exhibited once without barriers (Culture Night 2018) and it is the only time i've had to clean chocolate from my models, and 3-4 minifigs from my Ninjago City & Docks display went missing. This experience has put me firmly into the barriers are essential camp of exhibitors. Especially as i've now mostly moved away from having official models padding out space on a table and my MOC displays are getting more complex and detailed as i learn new techniques and use them for displays.
I'd love to do culture night again this year, and any other exhibits LUG.ie has planned, but lack of barriers means having to spend most of your time asking children not to touch the displays and that constant inturruption makes it really difficult to hold a converstation with those who are interested in finding out more about what you have on display. So unfortunately this has put me off displaying with LUG.ie for the moment which is a shame as it's something i'd like to do.