Nice present!
I leave nothing in my egg that isn't bolted down that is of any value or has even a small temptation level for thieves. They can take blocks of wood, old tools and even my second (3rd and 4th) hand dishes without me cryin'. Electronics are another thing.
I googled your tv, and can't see clearly how it mounts, but it looks like it is bolted in? If so, I wouldn't worry about it.
I haven't installed that particular model, but I have a msall lcd tv permanently mounted on the side of my kitchen cabinet over the dinette. It is mounted similar to a recessed ceiling
light, so it would be hard to get out and still be functional, but, as with any thing or place, if someone wants it bad enough, they will find a way.