Do you mean 'already' in terms of time of day? Does seem to get worse after dark and with some of the largest groups to date out there protesting right now, I suspect tonight will be bad. On the other hand -as you mentioned- There are probably a lot more NG in place to get involved tonight.
Yes, normally, at least in past riots and even last night, dusk thru about 1230 seems to be when things get really ugly. Normally the looting doesn’t start until the sun is setting