shoon.. Over the years I've seen many, many scams in penny stocks. They almost always include the R/S (wash, rinse, repeat). And they do not have a real product. QNTA is a couple notches well above that IMO. The SEC investigation has really hammered this puppy though.
Dilution is ALWAYS a key component of a startup company. That's usually their only means of raising capital. To avoid this high risk, investors should stay away from penny stocks and stick with the big boards. Otherwise, this risk is SOP and goes with the territory.
If a shareholder is polite, they will talk to you over the telephone. But what is the point if the SH simply screams at them or lashes out at them. I wouldn't waste my time talking to such a SH either.
If an investor's risk tolerance is very low, they always have the option of selling their shares and taking the tax write-off... which can be spread out over multiple years. This is a viable option to avoid the grief and permit 'moving on' in the trading world. Every investor has to make that decision for themselves.