>> It is really bad to daisy chain power strips as long as you dont overload them? << NO PROBLEM.
But the key point is "as long as you dont overload them"
may you will not overload it, but another comes in and plugs in a toaster, or a washing machine...and there you go.
the reason WHY : most power strips are made for a certain load, in terms of current say 20 A.
if you make a daisy chain of 10 power strips, and you plug in 4 A in each (far from over loading) you get this situation : power strip = PSTR ; LOAD = 4A
AC outlet -->PSTR1--->PSTR2-->PSTR3-->PSTR4-->PSTR5-->PSTR6-->PSTR7-->PSTR8-->PSTR9-->PSTR10
Load : 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A
Total Load 40A 36A 32A 28A 24A 20A 16A 12A 8A 4A
causing fire, and melting from around PSTR 5