well, it's not needed ... I mean Oracle manages it's indexes alone, rebuild is more used to unfragment or to move indexes, but except the fact that it consumes time and CPU resources, there is no problem in doing that ... if you have no query running of course
Sure there are negative implications. For example, all the cached blocks of the frequently used index will be flushed out of the buffer cache, resulting in decreased performance immediately after the index rebuild.
Jurij Modic ASCII a stupid question, get a stupid ANSI
24 hours in a day .... 24 beer in a case .... coincidence?