You want to be very carefull around CRT's. The voltages are indeed life threatening. Especially the aquadag and certainly focus screens as well.
Although DC will not cause you to do the 60hz shuffle, 30 to 50 mA. is all thats required to cause cardiac arrest.
Take it from someone who deals with high energy sources everyday ( I am an Industrial Electrician). I mind my manners around CRT's
