That is quite interesting to know about the FIFO Violation, and it will be useful to all US traders. And it will be great to be confirmed from other brokers too.
I have Kuwaiti residence and US in the same time, so have the Kuwaiti allows me to open accounts easily. I read the topic above and Petko is write that you should concentrate on pips if you use different lot sized.
The hard thing will come when you select one asset to trade on real account. So if you have 2-3 EAs for EURUSD for example, you will need to place them with different lots as well. Of course, if you are trading with huge lots as 1.23, 1.24 etc is not an issue, but if you trade with 0.01 and 0.02, it would be double trading for one.