@shorena,
I honestly don't know how you've survived on this forum for so long. You have the patience of a saint.
It seems that there are a lot of people, who fail at basic logic, mathematics and reading and comprehension, who have somehow stumbled into the world of Bitcoins.
I'm not sure if it is the media stories talking about people making fantastic amounts of money because Bitcoin went from being near worthless to being ~USD$650... but there are a lot of people around who just don't seem to understand the core concepts.
Granted, the world of crypto can be very confusing, and public keys, private keys, hashes and all the associated math and interrelationships can be a bit overwhelming... but still... a little bit of reading is enough to grasp the fundamentals, which (tricky crypto math aside) isn't really that hard to understand.
Split key generation is perfectly safe... at least as safe as Bitcoin itself. I assume that poster was getting confused with so-called vanitygen websites that don't do split key and just spit out a pub/priv key pair and "promise" not to record the private key...
Also... why people don't just download the vanitygen app themselves and run it is beyond me??
It's tiny, and even on a single AMD R9-270 card I can generate relatively simple 4 or 5 char vanity addresses in minutes...