Modren arts

Does anyone think mixing martial arts together is a good idea, I was thinking of the people who add say Karate with say Judo to create a "New" art. I just get the feeling that both arts may lose somethig. And these people don't always bring anything original in to this "New" art. I know the arts which are taught in the Bujinkan (there are nine arts taught) seem to have a common theame which tie them together, but modern arts seem to just have a mix n match feel. What do you guys think?

its a good idea i know alot of clubs have done it and gives a wider spec on things

hi
think the best place to start here is with the word " new" , there are no new arts just re hashes of old principles and concepts .
if you look at 99% of arts around today they are all from this genre .
my base art kenpo is a mix of about 9 different styles .
tkd is based on shotokan .
kickboxing based on sport karate which came from kumite .
so in reality near on all systems and styles are mixed .
now if we are talking about mma , the mix of a ground base and a standing base to creat a fighting method , i teach a thai /bjj hybrid ( quite common) and none of the methods are new , a punch is a punch and a kick is a kick it's just that the flavour of the day that changes , i had been teaching kfs for 10 yrs , now mma ( or submission) is big we are heaving , our mma nights are now capped as i cant take any more .
if the hybrid seems random then it usually is, and has been started by someone with no experience and no understanding of principle and concept that is used to create a art form .
it is a tricky subject and one that will rage for years to come .

cheers
matt