These are the default reputations in a vanilla (1.0) server:

house = 0.91, li_n_grp
house = 0.91, li_lsf_grp
house = 0.65, li_p_grp
house = 0, br_n_grp
house = 0, br_p_grp
house = 0, ku_n_grp
house = 0, ku_p_grp
house = 0, rh_n_grp
house = 0, rh_p_grp
house = 0, co_alg_grp
house = 0, co_be_grp
house = 0, br_m_grp
house = 0, co_nws_grp
house = 0, co_hsp_grp
house = 0.65, co_ic_grp
house = -0.3, co_khc_grp
house = -0.3, co_kt_grp
house = 0, rh_m_grp
house = 0.65, co_me_grp
house = 0.65, co_ni_grp
house = 0, co_os_grp
house = -0.3, co_rs_grp
house = -0.3, co_shi_grp
house = 0.65, co_ss_grp
house = 0, co_ti_grp
house = 0.65, co_vr_grp
house = -0.3, fc_bd_grp
house = -0.3, fc_b_grp
house = -0.65, fc_c_grp
house = -0.3, fc_fa_grp
house = -0.3, fc_g_grp
house = -0.3, fc_gc_grp
house = -0.3, fc_h_grp
house = -0.3, fc_j_grp
house = -0.65, fc_lh_grp
house = -0.65, fc_lr_grp
house = -0.3, fc_lwb_grp
house = -0.65, fc_m_grp
house = -0.65, fc_ou_grp
house = -0.65, fc_rh_grp
house = 0, fc_or_grp
house = -0.65, fc_u_grp
house = -0.65, fc_x_grp
house = 0, gd_gm_grp
house = 0, fc_uk_grp
house = -0.65, fc_n_grp
house = -0.65, fc_ln_grp
house = -0.65, fc_kn_grp
house = -0.65, fc_rn_grp
house = 0, fc_ouk_grp
house = 0, fc_q_grp
house = 0, fc_f_grp
house = 0, gd_im_grp
house = 0, gd_z_grp
house = -0.3, gd_bh_grp

0.91 will blink you as a solid buddy. If you have a friend who can see your ship it will probably say NAVY-yourpilotnamehere.

Yeah, it basically means you're the top dog in their honorable ranks.
So, conversely.....the bad guys really have the hots for you.