  In ultra-relativistic heavy ion collisions at $\roots\approx200$ GeV, the
azimuthal emission anisotropy of hadrons with low and intermediate transverse
momentum ($p_T\lesssim 4$ GeV/c) displays an intriguing scaling. In particular,
the baryon (meson) emission patterns are consistent with a scenario in which a
bulk medium of flowing quarks coalesces into three-quark (two-quark) "bags."
While a full understanding of this number of constituent quark (NCQ) scaling
remains elusive, it is suggestive of a thermalized bulk system characterized by
colored dynamical degrees of freedom-- a quark-gluon plasma (QGP). In this
scenario, one expects the scaling to break down as the central energy density
is reduced below the QGP formation threshold; for this reason, NCQ-scaling
violation searches are of interest in the energy scan program at the
Relativistic Heavy Ion Collider (RHIC). However, as $\roots$ is reduced, it is
not only the initial energy density that changes; there is also an increase in
the net baryon number at midrapidity, as stopping transports entrance-channel
partons to midrapidity. This phenomenon can result in violations of simple NCQ
scaling. Still in the context of the quark coalescence model, we describe a
specific pattern for the break-down of the scaling that includes different flow
strengths for particles and their anti-partners. Related complications in the
search for recently suggested exotic phenomena are also discussed.
