It is possible to rot Dracula roots, I do it all the time
I don't completely agree with Phantasm on the s/h part. I don't think it would be difficult to intercept a some spikes before they go down or gently pull the spikes out of the leca. I would think that some will make their way out of the leca too. But then again, I have never tried it.
I suppose you could grow your plant in a saucer if you wanted to try it. I would think the roots would rot unless there was very little water in the saucer otherwise it would be like a bog plant.