[K.S.H]

There beaded both internally and externally, just depends on the manufacturer and which way he thinks about security.
externally beaded you can kick or push as hard and for as long as you like from outside and you won't push that panel in, your up against 5mm or so of solid plastic so its not going anywhere, you could take the beading out though, remove the spacers and the panel will literally fall out - hence the siliconing in to stop this, it will be hard to get hold of it and pull it out if its held with silicone.
Internally beaded Can't get at the beading to remove the panel, they don't take much to be kicked in though, that beadings only held in by a sliver of plastic