As you can see, people are pretty torn on this subject. Generally, and this is not a rule because all animals are different. But generally, if you have only one male, plenty of space and plenty of food you should be able to keep your beardies together. There are problems though, the male may become overly agressiive an need to be seperated, and then you may find the females get along fine. Or you may have an agressive female and need to seperate her. Basically you need to watch them very closely and seperate them if there are any signs of trouble. Have spare tanks available so you dont end up having no where to put one if need be.
Also...
When setting up a tank to house multiple beardies make sure you get fecals done on all of them and get any parasites taken care of before they are all together. Also make sure that you have a basking spot avaiable for each dragon, and a basking spot for each of them on the cool side as well.
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0.1 Bearded dragon
0.1 mexican kingsnake
1.0.2 Leopard Gecko's
0.0.1 Rose Hair Tarantula
1.0 BTS
0.0.1 Reverse Okeetee Corn
0.1 Bullmastiff
4.1 Cats