i split lane all the time on the freeway when traffic is slow...now on the street i do not split when the there are only 4 or 5 cars in front of me...safest way to split lane is when traffic is at a stop, there is enough room, then proceed with caution...
people get pissed sometimes because you can do it while they are stuck...best advice is to wear a tinted visor...that way you don't give a **** because they can't recognize you...