Certainly his actions were destructive to a social fabric, or elements thereof. However, I don't think that anyone of good sense takes too seriously the nightmarish visions of a total collapse of order that Forrest's words summon to mind if the site had been left to run. The alternatives do not reduce to the current structure of a fabric and no fabric at all.
Nor does the charge itself make any particular sense, at least in terms of ideals to hold to. Progress is always built on the destruction, partial or total, of a previous way of life. Thus, when destruction becomes impossible, the liabilities that history places upon us, both in terms of mistakes and in terms of functions which no longer match the demands of life, come to dominate all attempts to adapt society to a more fitting form.
The sentence is, at least on those grounds, a farce. Some social fabrics should be destroyed - that something better may take their place. I'm not going to advocate either way on whether that's the case here, but to imprison someone simply because they perform an act with such a function is to reduce yourself to a tyrant.