It is not the technology that is dangerous but the scale and manner of its deployment. Patented, opaque, closed source, championed by mega-corporations closely allied with powerful governments, entirely beyond the analysis or oversight of the vast majority of citizens, completely connected realtime to various other systems, automated, eternally slurping up data for indefinite storage... these are the real concerning…
Don't kid yourself, even the 'watchers' will be 'watched'. The people bringing all these systems together will not be your local yocal Barney Fifes. They will be professional and highly intelligent technical teams whose members have likely studied little other than security and intelligence gathering for their entire professional lives. These are not the type of teams that carelessly leave obvious security holes like that laying around.
Taken as a whole, the technologies coming out today will enable surveillance regimes the likes of which even the UK and China never previously would have dared to dream up.