People should certainly be aware that there are charlatans out there.
However, there are also quite a few non-charlatans and reputable, long-lasting flying schools (the one for whom I instruct, for example
) who offer a discount on fees paid in advance.
Admittedly, it is difficult for a newbie with no experience to decide on first sight whether he's talking to a shyster or a repuatable school owner, but should he NEVER pay a lump sum in advance?