A lot of people rail against tabs; most of the time, these are people who don't understand them or have never tried to use them.
You see this debate about tabs vs. spaces in code all the time, and I've yet to hear any valid argument about why spaces are better (at least in any modern context). But there is an obvious reason that tabs are better: It's much easier to line things up, keep them aligned across different users' fonts, and realign them if you change the text to cross a tab.