E145 WITH ZJX CLBING UTILIZING VISUAL SEPARATION EXPERIENCES TCASII RA AND CAUSES CONCERN TO CONFLICTING DH8 ACFT.

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I WAS CAPT OF ACR X DURING INITIAL CLB ON SCHEDULED FLT FROM CAE-DCA. ATC CALLED TFC OFF OUR L 1000 FT ABOVE. WE SAW TFC AND ADVISED TFC IN SIGHT. ATC SAID MAINTAIN VISUAL SEPARATION; CLB MAINTAIN FL230. AT THAT TIME; I SWITCHED FROM FLT LEVEL CHANGE WHICH WAS PROVIDING APPROX 2000 FPM CLB TO VERT SPD AND SCROLLED DOWN TO SLOW CLB. AT ALL TIMES; I HAD TFC IN SIGHT. I RECEIVED AN RA WHICH SAID MONITOR VERT SPD. AT THIS TIME; I USED ILS; OVERRIDING AUTOPLT TO LOWER NOSE. I FEEL AT NO TIME SAFETY WAS COMPROMISED. IN FACT; ON MANY OCCASIONS; I HAVE SEEN TFC AS CLOSE. THE OTHER PLT WAS UPSET. HE KEYED THE MIKE SAYING THAT WAS RIDICULOUS AND THAT HE WAS FILING A RPT. I STATED THAT WE HAD YOU VISUALLY AND RESPONDED APPROPRIATELY TO THE RA. HE SAID THAT IF I HAD HIM VISUALLY; I SHOULD NOT HAVE RECEIVED AN RA. I DISAGREE; BECAUSE IT IS PHYSICALLY IMPOSSIBLE TO GO FROM A 2000 FPM CLB TO LEVEL FLT (OR DSCNT) INSTANTANEOUSLY. THERE WILL BE SOME FLOAT. I USED SMOOTH APPLICATION OF PITCH; BECAUSE AT ALL TIMES; I FELT SAFETY WAS NOT COMPROMISED. MORE ABRUPT PITCH FORWARD COULD HAVE TOSSED THE FLT ATTENDANT. I WOULD HAVE USED MORE ABRUPT PITCH CTL THOUGH IF I FELT SAFETY WAS BEING COMPROMISED. A PROB ARISING FROM THIS WAS THE DASH8 PLT CHALLENGING ANOTHER PLT ON FREQ. THIS IS SIMILAR TO TFC (ON THE GND) CONFRONTATIONS AND CAUSES UNNECESSARY DISTRS. ATC DID NOT SEEM CONCERNED NOR DID THEY ASK EITHER PLT TO CONTACT THEM. IT IS COMMON KNOWLEDGE THAT SEVERAL MEMBERS OF THE DASH8 PLT GROUP STRONGLY DISLIKE OUR PLT GROUP BECAUSE OF CONTRACTUAL ISSUES. I FEEL THE DASH8 OVER-EXAGGERATED THE INCIDENT FOR THIS REASON. THE FACT THAT HE REFERRED TO US AS 'THAT ACR FLT' INSTEAD OF OUR PROPER CALL SIGN CONFIRMS THIS.