If you are new to Bitcointalk you may not realize how things work around here. Ask yourself this - why would someone who states that Raiblocks is crap/a pump and dump/full of flaws, etc. keep coming on here posting the same thing over and over again even though it has already been addressed numerous times before? Because they care about noobs and want to protect them from the big bad Raiblocks dev stealing their money? LOL, I think not.
There are 3 reasons for these FUD (Fear, Uncertainty, Doubt) posts:
1) Usually the person posting the FUD is actually holding the coin they are bashing - they make negative posts in an attempt to drive down the price so they can buy more.
2) They may also be holding a competing coin (IOTA for example) and they are angry that another coin has taken the spotlight away from them. You can spot people in this group as they will often have a signature advertising another coin or they will shill it directly in their post.
3) Pure saltiness. This forum has really gone downhill over the years and it is now filled with desperate, salty children who are angry that they missed the boat.
The world is full of toxic people who cannot accomplish anything on their own so they try to make themselves feel better by attacking other people's accomplishments. Ignore them and DO YOUR OWN RESEARCH!