Basic question, lets say I have 345 users all working on sites that were all cloned and setup the same - theme, tweaks, plugins, settings.
Then along comes user #233 and she changes something, like hardcodes her site's footer with a bunch of ads in it.
Does this go crazy and all of a sudden appear on everyone else's site in the footer? - remembering they all use the same theme.
I'm new to this so apologies if this is the most basic question ever!
Thanks in advance.